JP3701836B2 - Printing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing apparatus capable of performing double-sided printing on a printing paper and single-sided multicolor printing.
[0002]
[Prior art]
In general, a printing apparatus has a plate cylinder in which an ink-permeable peripheral wall having a porous structure is arranged in a cylindrical shape and is rotatable about its own axis. On the outer peripheral surface of the peripheral wall, a stencil sheet made of stencil is wound and installed. Inside the plate cylinder, there is ink supply means for supplying ink so as to pass through the outer peripheral surface of the peripheral wall. On the outer side of the plate cylinder, there is a pressing means for pressing the printing paper against the outer peripheral surface of the peripheral wall (plate stencil sheet). Then, in synchronism with the rotation of the plate cylinder, the printing paper is supplied between the plate cylinder and the press roll, and the printing paper is pressed against the stencil paper attached to the plate cylinder so that the perforated portion of the stencil paper is removed. Ink passes and is transferred to the printing paper and printing is performed.
[0003]
[Problems to be solved by the invention]
However, since the conventional printing apparatus described above continuously prints the image on the stencil sheet made on the printing paper on the printing paper, when performing double-sided printing on the printing paper, one of the necessary number of printing papers is temporarily used. After printing on this side, a new stencil sheet is made and the other side of the previously printed printing paper is printed. That is, in the conventional printing apparatus, there is a problem in that it is necessary to perform the printing twice, and it requires a troublesome work twice.
[0004]
The double-sided printing is applied when printing the same image on each side of the printing paper. For example, one side is the same image and the other side is used for postcard printing such as New Year's cards or direct mail. Cannot be applied to printing with a different address, and the other side of the address must be performed separately from the printing device, such as handwriting or printing with a printer connected to a personal computer, etc. There was a problem that I could not get it.
[0005]
In addition, even when performing single-sided (multicolor) printing on printing paper with a conventional printing apparatus, after printing once on one side of the required number of printing papers, making a new stencil sheet, There is a problem that printing is performed on the same side of the previously printed printing paper, that is, printing has to be performed twice, requiring work twice.
[0006]
Therefore, in order to solve the above-described problems, the present invention performs printing by transporting printing paper once, with one side of double-sided printing or a part of single-sided overprinting being printed differently for each printing paper. An object of the present invention is to provide a printing apparatus capable of performing the above.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, according to a first aspect of the present invention, there is provided a printing apparatus that automatically feeds stacked printing paper and one surface of the printing paper fed from the paper feeding unit. A printing apparatus main body having a printing unit that performs printing on a paper, and a paper discharge unit that automatically discharges and stores the printed printing paper;
  A printing unit for performing different printing on one or the other side of the printing paper;
  The printing unit is detachably attached to the paper feed unit side or the paper discharge unit side, and prints on the printing paper printed by the printing unit at the printing unit, or Printing is performed by the printing unit on the printing paper printed by the printing unit.A printing device,
  The printing unit is arranged so that a print head unit for printing on the printing paper can be reversed and printed on one or the other side of the printing paper, and selected for each side of the printing paper. And printIt is characterized by that.
[0008]
  According to a second aspect of the present invention, in the printing apparatus according to the first aspect, the paper feeding unit of the main body of the printing apparatus includes a paper feeding table on which the printing paper is stacked, and the paper stacking on the paper feeding table. A paper feed mechanism that automatically feeds printing paper one by one; and a paper feed transport unit that transports the fed print paper to the printing unit,
  The printing unit includes a paper feeding table on which the printing paper is placed, and another paper feeding mechanism unit that automatically feeds the printing paper placed on the paper feeding table one by one.,markA transport unit that transports the printed printing paper,
  The printing unit is mounted on the paper feed table, the print paper placed on the paper feed table is fed to the print head by the other paper feed mechanism, and printing is performed. The printing paper is delivered from the transport unit to the paper feed mechanism unit.
[0009]
  According to a third aspect of the present invention, in the printing apparatus according to the first aspect, the paper feeding unit of the printing device main body includes a paper feeding table on which the printing paper is stacked, and the paper stacking on the paper feeding table. A sheet feeding mechanism that automatically feeds printing paper one by one; and a sheet feeding conveyance unit that conveys the fed printing paper to the printing unit. Are configured to move together,
  The printing unit is,markA transport unit that transports the printed printing paper,
  The printing unit is mounted between the paper feed conveyance unit and the moved paper feed mechanism unit, and the paper feed mechanism unit feeds the printing paper to the print head unit to perform printing. The printing paper is transferred from the transport unit to the paper feed transport unit.
[0010]
  According to a fourth aspect of the present invention, in the printing apparatus according to the first aspect, the paper discharge unit of the printing apparatus main body includes a paper discharge conveyance unit that conveys the printing paper printed by the printing unit, A discharge tray for storing the conveyed printing paper,
  The printing unit is,PreviousA conveyance unit that conveys the printing paper; and a paper discharge mounting table that accommodates the conveyed printing paper,
  The printing unit is mounted on the paper discharge tray, the print paper transported from the paper discharge transport unit is printed by the print head unit, and the printed print paper is discharged from the transport unit to the paper discharge tray. It is characterized by being housed in a table.
[0011]
  The printing apparatus according to claim 5 is the printing apparatus according to claim 1, wherein the paper discharge unit of the printing apparatus main body includes a paper discharge conveyance unit that conveys the printing paper printed by the printing unit; A discharge tray for storing the conveyed printing paper, and the discharge tray is configured to be movable,
  The printing unit is,markA transport unit that transports the printed printing paper,
  The printing unit is mounted between the paper discharge transport unit and the moved paper discharge tray, and the print head transported from the paper discharge transport unit performs printing by the print head unit, and the printed The printing paper is accommodated in the paper discharge tray from the transport unit.
[0013]
  Claim6The printing apparatus according to claim 1 is a claim.5In the printing apparatus according to any one of the above, the printing unit includes a plurality of print head units that perform printing on the printing paper so as to perform printing on one side or both sides of the printing paper, and one side of the printing paper. Alternatively, it is characterized in that overprinting is performed on both sides.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The printing apparatus of the present invention is one in which a printing unit is mounted on a printing apparatus main body. Hereinafter, a first embodiment of a printing apparatus of the present invention will be specifically described with reference to the drawings.
[0015]
First, the printing apparatus main body will be described.
FIG. 1 is a side view showing an example of a printing apparatus main body.
As shown in FIG. 1, the printing apparatus main body includes a printing unit 1, a plate making unit 2, a paper feeding unit 3, a paper discharging unit 4, and a plate discharging unit 5.
[0016]
The printing unit 1 mainly has a plate cylinder 6 and a paper cylinder 7.
The plate cylinder 6 has two disk-shaped side plates 8 at both ends, and these side plates 8 are connected by a rigid clamp base plate 9. A peripheral wall 10 is disposed around each side plate.
[0017]
The peripheral wall 10 is made by weaving a flexible wire made of stainless steel wire or the like into a net shape. Therefore, the peripheral wall 10 has flexibility and can pass printing ink. Moreover, the surrounding wall 10 is wound around the outer peripheral surface of the side plate 8, one end wound is fixed to the clamp base plate 9, and the other end is connected to the crank base plate 9 via a spring. As described above, the peripheral wall 10 is arranged in a cylindrical shape along the outer peripheral surface of each side plate 8.
[0018]
A clamp plate 11 constituting a clamp mechanism is rotatably attached to the clamp base plate 9. The clamp plate 11 clamps one end (tip) of the stencil sheet M. The stencil sheet M is wound around the outer peripheral surface of the peripheral wall 10 after the front end of the stencil sheet M is locked to the clamp base plate 9 by the clamp plate 11.
[0019]
The plate cylinder 6 is supported so as to be rotatable around its own central axis that is cylindrical. The plate cylinder 6 is rotationally driven in a clockwise direction in FIG. 1 by a drive mechanism (not shown).
[0020]
An intermediate pressing roller 12 is supported in the plate cylinder 6. The intermediate pressing roller 12 extends in parallel with the axis of the plate cylinder 6, and its outer peripheral surface slides into contact with the inner peripheral surface of the peripheral wall 10, and a bulging deformation position where the peripheral wall 10 shown in FIG. It moves up and down to the steady position where the bulging deformation is released.
[0021]
A doctor rod 13 is supported in the plate cylinder 6 and extends in parallel to the outer peripheral surface of the intermediate pressing roller 12 at a minute interval. Ink is supplied from an ink supply unit (not shown) between the intermediate pressing roller 12 and the doctor rod 13 to form a wedge-shaped ink reservoir 14. Then, the ink in the ink reservoir 14 is supplied to the inner peripheral surface of the peripheral wall 10 while being measured through a minute distance from the doctor rod 13 by the clockwise rotation of the intermediate pressing roller 12 in FIG.
[0022]
The paper cylinder 7 is made of an inelastic material such as metal and has the same outer diameter as the plate cylinder 6. The paper cylinder 7 is provided in parallel to the plate cylinder 6 at a predetermined interval with respect to the peripheral wall 10. The paper cylinder 7 can be rotated in the counterclockwise direction in FIG. Further, the paper cylinder 7 has a concave portion 15 for avoiding interference with the clamp plate 11 for clamping the stencil sheet M in the plate cylinder 6 and the clamp base plate 9 when rotating itself. The paper cylinder 7 is provided with a paper clamp portion 16 that clamps (supports) the print paper P so as to be detachable.
[0023]
Next, the plate making unit 2 is a thermal paper composed of a base paper roll unit 17 that stores a heat-sensitive stencil sheet M made of a continuous sheet in a roll shape, and a plurality of dot-like heating elements arranged in a horizontal row. A head 18, a platen roller 19 disposed opposite to the thermal head 18, a base paper feed roller 20, a base paper guide roller 21, and a base paper cutter 22 are provided.
[0024]
The plate making section 2 feeds the stencil sheet M drawn from the base paper roll section 17 between the thermal head 18 and the platen roller 19 by the rotation of the platen roller 19. Image information relating to an image of a document read by an image sensor (not shown) is input to the thermal head 18. The thermal head 18 selectively heats each point-like heating element according to this image information, and performs dot matrix-like thermal perforation plate-making on the stencil sheet M. The document guide roller 21 is provided with a silicon damper or the like serving as a tension applying mechanism at its shaft portion, and appropriately applies tension to the stencil sheet M fed between the thermal head 18 and the platen roller 19. The stencil feed roller 20 feeds the stencil stencil M made to the plate cylinder 6 side. Further, the stencil sheet M which has been subjected to the plate making is cut into one plate by the base paper cutter 22. Further, the image information input by the plate making unit 2 includes stamp size data relating to the stamp printed on the stencil sheet M that has been made.
[0025]
Next, the paper feed unit 3 has a paper feed table 24 on which the print paper P is stacked. The printing paper P on the paper feed tray 24 is taken out one by one by a paper feed roller 25 and a paper roller 26. The taken printing paper P is conveyed to the nip portion of the timing roller pair 28 via the upper and lower paper guide members 27. The timing roller pair 28 feeds the printing paper P to a paper biting position by the paper clamping unit 16 of the paper cylinder 7 at a predetermined timing. The paper feed roller 25 and paper roller 26 for taking out the print paper P one by one form a paper feed mechanism, and the paper guide member 27 and timing roller pair 28 for transporting the print paper P therefrom are Forms the paper feeding and conveying unit.
[0026]
Next, the paper discharge unit 4 includes a paper discharge pinch roller 30 that discharges and conveys the printed printing paper P by a pinch roller action that cooperates with the paper cylinder 7. In addition, the paper discharge unit 4 includes a paper separation claw 31 that pulls the print paper P away from the paper cylinder 7 when the paper cylinder 7 rotates. The printing paper P separated from the paper cylinder 7 by the paper separation claw 31 is sent out to the printing flying table 33 by the paper ejection pinch roller pair 32. Further, the printing paper P is blown to the paper discharge table 34 by the inclination 33 a of the printing flight table 33 and is stacked and accommodated. Note that the paper discharge pinch roller pair 32 and the printing flying board 33 form a paper discharge conveyance unit.
[0027]
The paper discharge pinch roller 30 and the paper discharge pinch roller pair 32 are arranged so as to be in sliding contact with only margins (non-print margin portions) on both sides of the printing paper P, and ink transferred onto the printing paper P is not reflected on these. . Each of the rollers 30 and 32 has the size of the printing paper P set on the paper feed table 24 so as to be in sliding contact with only the margins on both sides of the printing paper P regardless of the widthwise dimension of the printing paper P. The position is automatically adjusted accordingly.
[0028]
Next, the plate removal unit 5 has a plate separation claw 36 for peeling off the used stencil sheet M wound around the outer peripheral surface of the plate cylinder 6 from the plate cylinder 6. When the stencil sheet M is peeled from the plate cylinder 6, the clamping of the stencil sheet M by the clamp plate 11 of the plate cylinder 6 is released, and the end portion of the stencil sheet M that is opened as the plate cylinder 6 rotates is discharged and separated. Hook with nail 36. The stencil sheet M caught on the plate separation claw 36 is peeled off from the outer peripheral surface of the plate cylinder 6 by the further rotation of the plate cylinder 6. Further, the stencil sheet M peeled off by the plate removal separation claw 36 is conveyed by a plate discharge roller pair 37 and accommodated in a plate release box 38.
[0029]
In the printing apparatus main body described above, a series of printing operations are performed. That is, the stencil sheet M for one plate made by the plate making unit 2 is conveyed to the plate cylinder 6 side. Then, the front end of the conveyed stencil sheet M is clamped by the clamp plate 11, and wound around the outer peripheral surface of the peripheral wall 10 by the rotation of the plate cylinder 6. Next, one sheet of printing paper P on the paper feed tray 24 is taken out and conveyed to the nip portion of the timing roller pair 28. Next, the timing roller pair 28 feeds the printing paper P to a paper biting position by the paper clamping unit 16 of the paper cylinder 7 at a predetermined timing. Next, the plate cylinder 6 and the paper cylinder 7 are rotated synchronously, and the stencil sheet M wound around the plate cylinder 6 and the printing paper P clamped on the paper cylinder 7 are pressed against each other. As a result, the ink that has passed through the perforated portion of the stencil sheet M is transferred to the surface (one surface) of the printing paper P, and printing is performed. Next, the rotation of the paper cylinder 7 causes the paper clamp unit 16 to release the clamp of the printing paper P. The printing paper P is separated from the paper cylinder 7 by the paper separation claw 31 and is discharged via the printing flying table 33. The paper is discharged onto the paper board 34. Then, the used stencil sheet M is discharged by the discharging unit 5 as described above.
[0030]
Next, the printing unit will be described.
FIG. 2 is a side view showing an example of the printing unit.
As shown in FIG. 2, the printing unit includes a print head unit 41, a paper feed unit 42, and a paper discharge unit 43.
[0031]
The print head unit 41 includes a thermal transfer ribbon 45, a thermal head 46, and a conveyance roller 47.
[0032]
The thermal transfer ribbon 45 is formed by forming a carbon layer on the surface of the film. The thermal transfer ribbon 45 is wound around a pair of roll portions 48a and 48b. Usually, the thermal transfer ribbon 45 is all wound around one (right side in FIG. 2) roll part 48a, and the leading end pulled out from that is fixed to the other (left side in FIG. 2) roll part 48b. Note that at least the other roll portion 48b is rotationally driven in a counterclockwise direction in FIG. 2 by a rotational drive mechanism (not shown). Thereby, the thermal transfer ribbon 45 wound around one roll part 48a is transferred to the other roll part 48b and wound.
[0033]
The thermal head 46 is provided so as to be in contact with the thermal transfer ribbon 45 between the roll portions 48a and 48b. Image information from an image information output unit (not shown) (for example, a personal computer) is input to the thermal head 46. The thermal head 46 selectively heats each point-like heating element according to the image information, and transfers the carbon layer of the thermal transfer ribbon 45 onto the printing paper P. As the image information, different image information is input to each printing paper P, and different images can be printed on each printing paper P.
[0034]
The conveyance roller 47 nips the thermal transfer ribbon 45 with the thermal head 46. The transport roller 47 is rotationally driven in the clockwise direction in FIG. 2 by a rotational drive mechanism (not shown). The rotation driving mechanism for rotating the other roll portion 48b and the rotation driving mechanism for rotating the conveying roller 47 are used together, and the driving of the other roll portion 48b and the conveying roller 47 is interlocked.
[0035]
The transport roller 47 transports the printing paper P sent between itself and the thermal transfer ribbon 45 to the left side in FIG. The carbon layer is transferred onto the printing paper P by the thermal head 46 when the printing paper P is conveyed. In addition to the transfer of the printing paper P by the transfer roller 47 and the transfer of the carbon layer, the transfer of the thermal transfer ribbon 45 to the other roll portion 48b is also performed.
[0036]
Next, the paper feed unit 42 has a paper feed platform 51 on which the print paper P is stacked. The printing paper P on the paper feed table 51 is taken out one by one by a paper feed roller 52 and a paper roller 53. The taken printing paper P is conveyed by the feed roller 55 via the guide plate 54. The feed roller 55 feeds the printing paper P between the transport roller 47 and the thermal transfer ribbon 45. It should be noted that the paper feed roller 52 and paper roller 53 for taking out the print paper P one by one form separate paper feed mechanisms.
[0037]
Next, the paper discharge unit 43 serves as a transport unit that transports and discharges the printing paper P printed by the print head unit 41. The printed printing paper P is conveyed by the feed roller 58 via the guide plate 57. Further, the printing paper P conveyed by the feed roller 58 is discharged from the printing unit by the paper discharge roller 59.
[0038]
By the way, the printing unit is configured such that the print head unit 41 is turned upside down. Specifically, as shown in FIG. 3, the print paper P is a portion that is conveyed, and is inverted up and down around the nip portion of the thermal transfer ribbon 45 by the thermal head 46 and the conveyance roller 47. At this time, the transport roller 47 is rotationally driven in the counterclockwise direction in FIG. 3, and the other roll portion 48b is rotationally driven in the clockwise direction in FIG. That is, by inverting the print head unit 41, printing is performed on the back surface (the other surface) of the printing paper P in FIG. 2, and printing is performed on the front surface (one surface) of the printing paper P in FIG.
[0039]
The printing unit configured as described above is attached to the printing apparatus main body. In the first embodiment, the printing unit is attached to the paper feeding unit 3 of the printing apparatus main body.
[0040]
Specifically, as shown in FIG. 4, the printing paper P is not present on the paper feeding table 24 of the paper feeding unit 3 of the printing apparatus main body, and the printing unit is placed there. In this case, in the printing unit placed on the paper feed tray 24, the paper discharge roller 59 contacts the paper feed roller 25 of the paper feed unit 3 of the printing apparatus main body. In the printing unit shown in FIG. 4, the print head unit 41 is located at the position shown in FIG. 2, and printing is performed on the back surface (the other surface) side of the printing paper P placed on the paper feed platform 51. The placed printing unit may be fixed to the printing apparatus main body side by fixing means such as a screw or a catch clip, or engaging means that engage with each other on the printing unit side and the printing apparatus main body side.
[0041]
As described above, in the printing apparatus in which the printing unit is attached to the printing apparatus main body, the printing paper P placed on the paper feeding platform 51 of the printing unit is conveyed to the printing head unit 41 by the paper feeding unit 42. Then, printing is performed on the back surface (the other surface), and the paper is discharged by the paper discharge unit 43. Subsequently, the printing paper P printed by the printing unit is fed to the printing apparatus main body side by the paper ejection roller 59 of the paper ejection section 43 and the paper feeding roller 25 of the paper feeding section 3 of the printing apparatus main body. The In the printing apparatus main body, printing is performed on the front side (one side) of the printing paper P, and the paper is discharged onto the paper discharge tray 34.
[0042]
When the printing unit is not used, the printing unit may be removed from the printing apparatus main body, and printing may be performed by placing the printing paper P on the paper feed tray 24 of the printing apparatus main body.
[0043]
Therefore, in the printing apparatus according to the first embodiment described above, the back surface (the other surface) or the front surface (the one surface) of the printing paper P with respect to the printing device body that performs printing on the front surface (one surface) of the printing paper P. A printing unit for printing is attached to the front side. Thereby, it is possible to perform double-sided printing or single-sided overprinting on the printing paper P without trouble in one conveyance of the printing paper P.
[0044]
Specifically, for example, postcard printing such as New Year's cards and direct mail, etc., it is applied to printing in which the front surface (one side) of the printing paper P has the same image and the back side (the other side) has a different address. It becomes possible to do. In addition, it is also possible to print the same image with different characters on the surface (one surface) of the printing paper P by reversing the print head portion 41 of the printing unit.
[0045]
In addition, since the printing unit can be detached from the printing apparatus main body, it is possible to perform printing only on the printing apparatus main body side or printing using only the printing unit.
[0046]
Hereinafter, a second embodiment of the printing apparatus of the present invention will be specifically described with reference to the drawings. In the second embodiment described below, the same portions as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
[0047]
First, the printing apparatus main body will be described.
The printing apparatus main body in the second embodiment is different in the structure of the paper feeding unit 3 shown in FIG. 1 in the first embodiment. Specifically, the configuration of the sheet feeding unit 3 is the same, but the sheet feeding table 24 and the sheet feeding mechanism unit (the sheet feeding roller 25, the sheet separating roller 26, etc.) move together, and the sheet feeding and conveying unit ( The paper guide 27 and the timing roller pair 28) are separated from each other. This movement is performed by a guide rail 60 (see FIG. 6) that supports the paper feed table 24 and the paper feed mechanism.
[0048]
Next, the printing unit will be described.
FIG. 5 is a side view showing another example of the printing unit.
As shown in FIG. 5, the printing unit in the second embodiment includes a paper feed table 51 of the paper feed unit 42 in the first embodiment, another paper feed mechanism unit (paper feed roller 52, paper roller). 53). Other configurations are the same as those of the first embodiment.
[0049]
The printing unit configured as described above is attached to the printing apparatus main body. In the second embodiment, the printing unit is attached to the paper feeding unit 3 of the printing apparatus main body.
[0050]
Specifically, as shown in FIG. 6, in the paper feeding unit 3 of the printing apparatus main body, the paper feeding base 24 and the paper feeding mechanism unit are moved, and the printing unit is interposed between the paper feeding mechanism unit and the paper feeding transport unit. Is placed. In this case, in the printing unit, the guide plate 54 is adjacent to the paper roller 26 of the paper feeding unit 3 of the printing apparatus main body. In the printing unit, the paper discharge roller 59 is adjacent to the paper guide portion 27 of the printing apparatus main body. In the printing unit shown in FIG. 4, the print head unit 41 is located at the position shown in FIG. 5, and printing is performed on the back surface (the other surface) side of the printing paper P placed on the paper feed platform 51. Note that the placed printing unit is preferably fixed to the printing apparatus main body side by fixing means such as screws and catch clips, or engaging means that engage with each other on the printing unit side and the printing apparatus main body side. .
[0051]
As described above, in the printing apparatus in which the printing unit is attached to the printing apparatus main body, the printing paper P placed on the paper feeding table 24 of the printing apparatus main body is fed by the paper feeding roller 26 of the paper feeding unit 3. Each sheet is taken out from the sheet 24, guided to the guide plate 54 on the printing unit side, and conveyed to the print head unit 41 by the feed roller 55. The printing paper P is printed on the back surface (the other surface) by the print head unit 41 and discharged by the paper discharge unit 43. Subsequently, the printing paper P is sent by the paper discharge roller 59 of the printing unit to the paper guide unit 27 on the printing apparatus main body side, printed on the front side (one side), and discharged to the paper discharge tray 34. Paper.
[0052]
When the printing unit is not used, the printing unit is removed from the main body of the printing apparatus, and the paper feed table 24 and the paper feed mechanism unit (paper feed roller 25, paper roller 26, etc.) are moved to the paper guide unit 27 side. Print.
[0053]
Therefore, in the printing apparatus according to the second embodiment described above, the back surface (the other surface) or the front surface (the one surface) of the printing paper P with respect to the printing device main body that performs printing on the front surface (one surface) of the printing paper P. A printing unit for printing is attached to the front side. Thereby, it is possible to perform double-sided printing or single-sided overprinting on the printing paper P without trouble in one conveyance of the printing paper P.
[0054]
Specifically, for example, postcard printing such as New Year's cards and direct mail, etc., it is applied to printing in which the front surface (one side) of the printing paper P has the same image and the back side (the other side) has a different address. It becomes possible to do. In addition, it is also possible to print the same image with different characters on the surface (one surface) of the printing paper P by reversing the print head portion 41 of the printing unit.
[0055]
In addition, since the printing unit can be detached from the printing apparatus main body, it is possible to perform printing only on the printing apparatus main body side or printing using only the printing unit.
[0056]
Further, the printing unit has no configuration of the paper feed table 51 and another paper feed mechanism (the paper feed roller 52, the paper separating roller 53, etc.), and the configuration is simplified as compared with the first embodiment. The The printing apparatus main body is configured such that the paper feeding mechanism (the paper feeding roller 25, the paper roller 26, etc.) moves, but the movement through the guide rail 60 is not particularly difficult.
[0057]
Hereinafter, a third embodiment of the printing apparatus of the present invention will be specifically described with reference to the drawings. Note that in the third embodiment described below, the same portions as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
[0058]
First, the printing apparatus main body is configured similarly to the first embodiment (see FIG. 1).
[0059]
Next, the printing unit will be described.
FIG. 7 is a side view showing another example of the printing unit.
As shown in FIG. 7, the printing unit in the third embodiment includes a paper feed table 51 of the paper feed unit 42 in the first embodiment, another paper feed mechanism unit (paper feed roller 52, paper roller). 53). Further, the paper discharge unit 43 of the printing unit is provided with a paper discharge mounting table 61 for stacking and storing the print paper P discharged by the paper discharge roller 59. Other configurations are the same as those of the first embodiment.
[0060]
The printing unit configured as described above is attached to the printing apparatus main body. In the third embodiment, the printing unit is attached to the paper discharge unit 4 of the printing apparatus main body.
[0061]
Specifically, as shown in FIG. 8, the printing unit is placed on the paper discharge tray 34 of the paper discharge unit 4 of the printing apparatus main body. In this case, the printing unit placed on the paper discharge table 34 has the guide plate 54 adjacent to the paper discharge flight table 33 of the paper discharge unit 4 of the printing apparatus main body. In the printing unit shown in FIG. 8, the print head unit 41 is located at the position shown in FIG. 7, and printing is performed on the back surface (the other surface) side of the printing paper P placed on the paper feed platform 51. The placed printing unit may be fixed to the printing apparatus main body side by fixing means such as a screw or a catch clip, or engaging means that engage with each other on the printing unit side and the printing apparatus main body side.
[0062]
As described above, the printing apparatus in which the printing unit is attached to the printing apparatus main body performs printing on the surface (one surface) of the printing paper P placed on the paper feed tray 24 in the printing apparatus main body, and discharges it. It is conveyed to the paper unit 4. Subsequently, the printing paper P conveyed to the paper discharge platform 33 by the paper discharge pinch roller pair 32 on the printing apparatus main body side is supplied to the paper supply unit 43 on the printing unit side, and the print head unit 41 receives the print paper P. Printing is performed on the back surface (the other surface), and the paper is discharged onto the paper discharge mounting table 61.
[0063]
If the printing unit is not used, printing may be performed with the printing unit removed from the printing apparatus main body.
[0064]
Therefore, the printing apparatus according to the third embodiment described above has a back surface (the other surface) or a front surface (one surface) of the printing paper P with respect to the printing device main body that performs printing on the front surface (one surface) of the printing paper P. A printing unit for printing is attached to the front side. Thereby, it is possible to perform double-sided printing or single-sided overprinting on the printing paper P without trouble in one conveyance of the printing paper P.
[0065]
Specifically, for example, postcard printing such as New Year's cards and direct mail, etc., it is applied to printing in which the front surface (one side) of the printing paper P has the same image and the back side (the other side) has a different address. It becomes possible to do. In addition, it is also possible to print the same image with different characters on the surface (one surface) of the printing paper P by reversing the print head portion 41 of the printing unit.
[0066]
In addition, since the printing unit can be detached from the printing apparatus main body, it is possible to perform printing only on the printing apparatus main body side or printing using only the printing unit.
[0067]
Hereinafter, a fourth embodiment of the printing apparatus of the present invention will be specifically described with reference to the drawings. Note that in the fourth embodiment described below, the same portions as those in the first embodiment or the second embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
[0068]
First, the printing apparatus main body will be described.
The printing apparatus main body in the fourth embodiment is different in the structure of the paper discharge unit 4 shown in FIG. 1 in the first embodiment. Specifically, the configuration of each of the paper discharge units 4 is the same, but the paper discharge table 34 moves and separates from the paper discharge conveyance unit (the paper discharge pinch roller pair 32, the print flying table 33, etc.). ing. This movement is performed by a guide rail 62 (see FIG. 9) or the like that supports the paper discharge table 34.
[0069]
Subsequently, the printing unit is configured similarly to the second embodiment (see FIG. 5).
[0070]
The printing unit configured as described above is attached to the printing apparatus main body. In the fourth embodiment, the printing unit is attached to the paper discharge unit 4 of the printing apparatus main body.
[0071]
Specifically, as illustrated in FIG. 9, the paper discharge unit 34 is moved in the paper discharge unit 4 of the printing apparatus main body, and the printing unit is placed between the paper discharge table 34 and the paper discharge transport unit. . In this case, in the printing unit, the guide plate 54 is adjacent to the paper discharge platform 33 of the paper discharge unit 4 of the printing apparatus main body. Further, the printing unit is adjacent to the moved paper discharge tray 34 on the paper discharge side of the paper discharge roller 59. In the printing unit shown in FIG. 9, the print head unit 41 is located at the position shown in FIG. 2, and printing is performed on the back surface (the other surface) side of the printing paper P placed on the paper feed platform 51. The placed printing unit may be fixed to the printing apparatus main body side by fixing means such as a screw or a catch clip, or engaging means that engage with each other on the printing unit side and the printing apparatus main body side.
[0072]
As described above, the printing apparatus in which the printing unit is attached to the printing apparatus main body performs printing on the surface (one surface) of the printing paper P placed on the paper feed tray 24 in the printing apparatus main body, and discharges it. It is conveyed to the paper unit 4. Subsequently, the printing paper P conveyed to the paper discharge platform 33 by the paper discharge pinch roller pair 32 on the printing apparatus main body side is supplied to the paper supply unit 43 on the printing unit side, and the print head unit 41 receives the print paper P. Printing is performed on the back surface (the other surface), and the paper is discharged onto a paper discharge tray 34 on the printing apparatus main body side.
[0073]
When the printing unit is not used, the printing unit may be detached from the printing apparatus main body, and printing may be performed by moving the paper discharge tray 34 to the paper discharge conveyance unit side.
[0074]
Therefore, the printing apparatus according to the fourth embodiment described above has a back surface (the other surface) or a front surface (one surface) of the printing paper P with respect to a printing device body that performs printing on the front surface (one surface) of the printing paper P. A printing unit for printing is attached to the front side. Thereby, it is possible to perform double-sided printing or single-sided overprinting on the printing paper P without trouble in one conveyance of the printing paper P.
[0075]
Specifically, for example, postcard printing such as New Year's cards and direct mail, etc., it is applied to printing in which the front surface (one side) of the printing paper P has the same image and the back side (the other side) has a different address. It becomes possible to do. In addition, it is also possible to print the same image with different characters on the surface (one surface) of the printing paper P by reversing the print head portion 41 of the printing unit.
[0076]
In addition, since the printing unit can be detached from the printing apparatus main body, it is possible to perform printing only on the printing apparatus main body side or printing using only the printing unit.
[0077]
In addition, the printing unit does not have the configuration of the paper feed table 51 and other paper feed mechanism units (paper feed roller 52, paper separating roller 53, etc.) as compared with the first embodiment, and the third embodiment. Compared with the embodiment of FIG. The configuration is simplified. The printing apparatus main body is configured such that the paper discharge table 34 moves. However, the movement through the guide rail 62 is not particularly difficult.
[0078]
In all the embodiments described above, the print unit 41 of the printing unit is illustrated as a single unit, but this is not restrictive. For example, as shown in FIG. 10, a plurality of print head units 41 may be provided in the transport direction of the printing paper P (indicated by arrows in FIG. 10). Further, it is preferable that a conveyance roller 63 is provided between the print head portions 41 to improve the conveyance of the printing paper P. Also, a plurality of print head portions 41 shown in FIG. 10 are provided corresponding to the respective surfaces so as to perform printing on both surfaces of the printing paper P.
[0079]
As described above, by providing the printing unit with the plurality of print head portions 41, it is possible to perform overprinting, duplex printing, and duplex printing on the printing unit side. In addition, by adopting different colors for the thermal transfer ribbon 45 of each print head unit 41, it is possible to perform multi-color overprinting, multicolor double-sided printing, and multicolor double-sided overprinting. Further, by adopting cyan, magenta, yellow, and black colors for the thermal transfer ribbon 45 of each print head unit 41, full color overprinting, full color duplex printing, and full color duplex printing can be performed.
[0080]
In addition, as shown in FIG. 10, the print head unit 41 prints either the front surface (one surface) or the back surface (the other surface) of the print paper P unexpectedly on both sides of the print paper P. It may be arranged. Furthermore, the print head unit 41 may be configured to be reversed. In all the embodiments described above, printing is performed on the front surface (one surface) in the printing apparatus main body, so even with this configuration, multicolor (full color) overprinting, multicolor (full color) double-sided printing. , And multicolor (full color) double-sided overprinting.
[0081]
Further, in all the above-described embodiments, the print head unit 41 of the printing unit is configured to perform thermal transfer printing using the thermal transfer ribbon 45 and the thermal head 46, but this is not restrictive. For example, as shown in FIG. 11, the print head unit 41 ′ may include an inkjet unit 65, a feed roller 66, and a drive unit 67 for the inkjet unit 65 and the feed roller 66. In particular, according to this print head unit 41 ′, if a plurality of ink colors (for example, cyan, magenta, yellow, black, etc.) are employed in the inkjet unit 65, multi-color printing including full color can be saved in a space-saving manner. Yes. Further, as shown in FIG. 12, the print head portion 41 'can be configured to be upside down as in the embodiment described above. The printing unit shown in FIGS. 11 and 12 has a configuration corresponding to the first embodiment described above, but may have a configuration corresponding to the second to fourth embodiments.
[0082]
【The invention's effect】
As described above, in the printing apparatus according to the present invention, the printing unit that performs printing on one or the other side of the printing paper is mounted on the printing apparatus main body that performs printing on one side of the printing paper. Thereby, double-sided printing or single-sided overprinting on the printing paper can be performed without trouble by carrying the printing paper once.
[0083]
In particular, as in postcard printing, the present invention can be applied to the case where one side of the printing paper is the same image and the other side is different. In addition, by reversing the print head portion of the printing unit, different characters and the same image can be printed on one side of the printing paper.
[0084]
Further, since the printing unit is detachably attached to the printing apparatus main body, it is possible to perform printing only on the printing apparatus main body side or printing using only the printing unit.
[Brief description of the drawings]
FIG. 1 is a side view showing an example (first embodiment) of a printing apparatus main body.
FIG. 2 is a side view showing an example (first embodiment) of a printing unit.
FIG. 3 is a side view showing a reversing operation of a print head unit of the printing unit of FIG. 2;
FIG. 4 is a side view in which a printing unit is attached to the printing apparatus main body according to the first embodiment.
FIG. 5 is a side view showing another example (second embodiment) of the printing unit.
FIG. 6 is a side view in which a printing unit is attached to the printing apparatus main body according to the second embodiment.
FIG. 7 is a side view showing another example (third embodiment) of a printing unit.
FIG. 8 is a side view in which a printing unit is attached to the printing apparatus main body according to the third embodiment.
FIG. 9 is a side view in which a printing unit is attached to a printing apparatus main body according to a fourth embodiment.
FIG. 10 is a side view showing another configuration of the printing unit.
FIG. 11 is a side view showing another configuration of the print head unit.
12 is a side view showing a reversing operation of the print head unit of the printing unit of FIG. 11. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Printing part, 3 ... Paper feed part, 4 ... Paper discharge part, 24 ... Paper feed stand, 25 ... Paper feed roller (paper feed mechanism part), 26 ... Paper separation roller (paper feed mechanism part), 27 ... Paper Guide unit (paper feeding / conveying unit), 28... Timing roller pair (paper feeding / conveying unit), 32... Paper discharge pinch roller pair (paper discharging / conveying unit), 33. Paper base 41, 41 '... print head part, 43 ... paper discharge part (conveyance part), 51 ... paper feed mounting base, 52 ... paper feed roller (another paper feed mechanism part), 53 ... paper roll roller (separate) , 61... Paper discharge table, P... Printing paper.

Claims (6)

A paper feeding unit that automatically feeds stacked printing paper, a printing unit that prints on one side of the printing paper fed from the paper feeding unit, and a paper that is printed out is automatically ejected. A printing apparatus main body having a paper discharge unit for receiving
A printing unit for performing different printing on one or the other side of the printing paper;
The printing unit is detachably attached to the paper feed unit side or the paper discharge unit side, and prints on the printing paper printed by the printing unit at the printing unit, or A printing apparatus that performs printing on the printing paper printed by a printing unit using the printing unit ,
The printing unit is arranged so that a print head unit for printing on the printing paper can be reversed and printed on one or the other side of the printing paper, and selected for each side of the printing paper. A printing apparatus characterized in that printing is performed . The paper feeding unit of the printing apparatus main body is fed with a paper feeding table on which the printing paper is stacked, a paper feeding mechanism unit that automatically feeds the printing papers stacked on the paper feeding table one by one, A paper feed conveyance unit that conveys the printing paper to the printing unit;
The printing unit includes a paper feed table for placing the printing paper, and another paper feed mechanism for automatically feeding one by one the print sheet placed on the sheet feed table, it is printed A transport unit for transporting the printing paper,
The printing unit is mounted on the paper feed table, the print paper placed on the paper feed table is fed to the print head by the other paper feed mechanism, and printing is performed. The printing apparatus according to claim 1, wherein the printing paper is transferred from the transport unit to the paper feeding mechanism unit. The paper feeding unit of the printing apparatus main body is fed with a paper feeding table on which the printing paper is stacked, a paper feeding mechanism unit that automatically feeds the printing papers stacked on the paper feeding table one by one, A sheet feeding conveyance unit that conveys the printing paper to the printing unit, and the sheet feeding table and the sheet feeding mechanism unit are configured to be movable together.
The printing unit, and a transport unit for transporting the printing paper is printed,
The printing unit is mounted between the paper feed conveyance unit and the moved paper feed mechanism unit, and the paper feed mechanism unit feeds the printing paper to the print head unit to perform printing. The printing apparatus according to claim 1, wherein the printing paper is transferred from the transport unit to the paper feed transport unit. The paper discharge unit of the printing apparatus main body includes a paper discharge transport unit that transports the printing paper printed by the printing unit, and a paper discharge tray that stores the transported print paper,
The printing unit has a transport unit that transports the pre-Symbol printing paper, a paper discharge table which accommodates the printing paper transported,
The printing unit is mounted on the paper discharge tray, the print paper transported from the paper discharge transport unit is printed by the print head unit, and the printed print paper is discharged from the transport unit to the paper discharge tray. The printing apparatus according to claim 1, wherein the printing apparatus is housed in a table. The paper discharge unit of the printing apparatus main body includes a paper discharge conveyance unit that conveys the printing paper printed by the printing unit, and a paper discharge tray that accommodates the conveyed printing paper. The paper base is configured to be movable,
The printing unit, and a transport unit for transporting the printing paper is printed,
The printing unit is mounted between the paper discharge transport unit and the moved paper discharge tray, and the print head transported from the paper discharge transport unit performs printing by the print head unit, and the printed The printing apparatus according to claim 1, wherein the printing paper is accommodated in the paper discharge table from the transport unit. The printing unit includes a plurality of print head units that perform printing on the printing paper so that printing is performed on one or both sides of the printing paper, and performs overprinting on one or both sides of the printing paper. The printing apparatus according to any one of claims 1 to 5 , wherein:

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